>On Sunday, Matt Watson, a video blogger, posted a 20-minute clip detailing how comments on YouTube were used to identify certain videos in which young girls were in activities that could be construed as sexually suggestive, such as posing in front of a mirror and doing gymnastics. I looked at some of the videos that appeared in his report and it's basically family videos of young girls, the same kind of videos my ow…
For your example ("the same kind of videos my own sisters would shoot with our dad's camcorder") there are two remedies:
1) Upload the video as unlisted, so it will not appear in recommendation systems and you can send the link to your friends/family.
2) Disable comments on the video.
Public content is a bit more dangerous to leave unchecked in 2019 than in 2009.